\begin{tikzpicture}[scale=0.8]
    \tkzDefPoints{0/0/A, 4/0/C, 4/3/B}
    \tkzDrawSegments(C,A  A,B)
    \tkzDrawSegments[-Stealth](B,C)
    \tkzLabelSegment[below](A,C){4尺}
    \tkzLabelSegment[above left](A,B){5尺}
    \tkzLabelSegment[right](B,C){3尺}
    \tkzLabelPoints[above](B)
    \tkzLabelPoints[right](C)
    \tkzLabelPoints[left](A)
\end{tikzpicture}

